Influence of rubber-metal bearings on vibrations of continuous reinforced concrete bridges and overpasses
Influence of rubber-metal bearings on vibrations of continuous reinforced concrete bridges and overpasses

Influence of rubber-metal bearings on vibrations of continuous reinforced concrete bridges and overpasses

DOI: 10.37153/2618-9283-2022-5-9-22


Shermukhamedov Ulugbek Z.
Professor of the Department of “Bridges and tunnels”, Dr. Sci. (Engineering), Tashkent State Transport University. Tashkent, Republic of Uzbekistan

Мирзаев Ибрахим Mirzaev Ibrakhim
Professor of the Department of “Applied Mechanics”, Doctor of Physical and Mathematical Sciences, Tashkent State Transport University. Tashkent, Republic of Uzbekistan

Каримова Анора Бахтиёровна Karimova Anora B.
assistant of the Department of “Bridges and tunnels”, Tashkent State Transport University. Tashkent, Republic of Uzbekistan

Rubric:     Theoretical and experimental studies   
Key words: bridges and overpasses, seismic protection, real earthquake records, seismogram, bearings

The effect of the type of rubber-metal bearings on the vibrations of continuous reinforced concrete bridges was calculated based on real earthquake records. To solve problems, the finite element method and finite difference method were used. The results of the calculation of normal maximum stresses, and longitudinal and vertical displacements of a monolithic overpass under dynamic load, based on the records of two real seismograms, are presented. The calculations performed, show that the span structure and supports of the overpass have a sufficient margin of safety in the event of strong and very strong earthquakes according to MSK-64. To ensure the guaranteed seismic safety of bridge structures, it is required to conduct design calculations based on sets of records of past earthquakes that are close in dominant frequencies to the characteristics of the construction site.

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